swapped email and email_client (othneildrew#59)

Reorder instructions to avoid bugs where replacing email would cause email_client to be not found. Replacing email_client is the acceptable solution because email can also be found.

BLANK_README.md

@@ -84,7 +84,7 @@
 
 [![Product Name Screen Shot][product-screenshot]](https://example.com)
 
-Here's a blank template to get started: To avoid retyping too much info. Do a search and replace with your text editor for the following: `github_username`, `repo_name`, `twitter_handle`, `linkedin_username`, `email`, `email_client`, `project_title`, `project_description`
+Here's a blank template to get started: To avoid retyping too much info. Do a search and replace with your text editor for the following: `github_username`, `repo_name`, `twitter_handle`, `linkedin_username`, `email_client`, `email`, `project_title`, `project_description`
 
 <p align="right">(<a href="#top">back to top</a>)</p>